package com.introduce.extract;

/**
 * 自定义接口：这里使用了空对象
 *
 * @author: cong zhi
 * @createDate: 2022/5/10 9:20
 * @updateUser: cong zhi
 * @updateDate: 2022/5/10 9:20
 * @updateRemark: 修改内容
 * @version: v1.0
 */
public interface Nullable {

    boolean isNull();
}
